After practicing for two days this week, New Orleans Saints receiver Adrian Arrington, who continues to work his back following meniscus surgery on his right knee, wasn't able to take the field Thursday.

Arrington, who made the team without having played in a single preseason game, experienced soreness in his knee on Wednesday night and sat out of drills.

He joined reserve tackle Marcel Jones as the only Saints players to miss practice on Thursday.

Saints interim coach Aaron Kromer said Jones, a rookie seventh-round pick, injured his left knee late in Wednesday's practice.

Linebackers Curtis Lofton (ankle) and David Hawthorne (knee) both participated fully in a practice, a good sign that they'll play in Sunday's season opener against the Washington Redskins at the Mercedes-Benz Superdome.